| 摘要 |
PURPOSE:To produce a polycarbonate having high molecular weight without lowering the excellent physical properties of polycarbonate resin, by adding a small amount of an alicyclic bishydroxy compound to an aromatic bishydroxy compound, and reacting with a carbonic acid ester under melting. CONSTITUTION:(A) An aromatic bishydroxy compound, preferably bisphenol A, etc. is mixed with (B) 0.1-40mol%, preferably 1-10mol% (based on the component A) alicyclic bishydroxy compound, preferably 1,3-cyclohexanediol or 1,4-cyclohexanediol and (C) 1-1.2mol, preferably 1-1.1mol (based on 1mol of A+B) of a carbonic acid ester, preferably diphenyl carbonate, etc. The mixture is charged to a reactor, added with a catalyst (e.g. lithium hydroxide), heated, and reacted while removing the produced monohydroxy compound from the reaction system e.g. by evacuation, etc., until the formation of distillate ceases.
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